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    • 9. 发明专利
    • Leak detection in a heat exchanger
    • GB2241339A
    • 1991-08-28
    • GB9008899
    • 1990-04-20
    • RUTHERFORD MATTHEW STEPHEN
    • RUTHERFORD MATTHEW STEPHEN
    • F28F1/00F28F3/00G01M3/02
    • A heat exchanger 2 which serves to separate and to conduct heat between two heat exchanging fluids 3, 4 consists of at least two layers 5, 6, 7 in intimate physical and thermal contact wherein each layer 5, 7 which directly contacts a heat exchanging fluid is substantially resistant to corrosion by that fluid and at least one of the layers 6 is easily corrodible by at least one of the fluids, such that if a leak of at least one in particular of the heat exchanging fluids commences development, it would cause an ever-spreading area of corrosion in the easily corrodible layer(s) 6. This corrosion would encompass the fine leak detecting channels 8 provided between the interface between at least one of the layers 5, 7 and the corrodible layer 6. Channels 8 form an intersecting network and one formed by grooves in one or both of the contiguous layers 5, 6, or 6, 7 or by strips of unbonded interface between the layers 5, 6 or 6, 7. The heat exchanger may be plate-like instead of tubular. If only one fluid is corrosive or abrasive then the network of channels need be provided only at the interface of the corrosible layer and the layer in contact with that fluid.